Qt 4.5: main.cpp Example File (xml/xmlstreamlint/main.cpp)

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# main.cpp Example File
xml/xmlstreamlint/main.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
     ** Contact: Nokia Corporation (qt-info@nokia.com)
     **
     ** This file is part of the examples of the Qt Toolkit.
     **
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     ** Licensees holding valid Qt Commercial licenses may use this file in
     ** accordance with the Qt Commercial License Agreement provided with the
     ** Software or, alternatively, in accordance with the terms contained in
     ** a written agreement between you and Nokia.
     **
     ** GNU Lesser General Public License Usage
     ** Alternatively, this file may be used under the terms of the GNU Lesser
     ** General Public License version 2.1 as published by the Free Software
     ** Foundation and appearing in the file LICENSE.LGPL included in the
     ** packaging of this file.  Please review the following information to
     ** ensure the GNU Lesser General Public License version 2.1 requirements
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     ** GNU General Public License Usage
     ** Alternatively, this file may be used under the terms of the GNU
     ** General Public License version 3.0 as published by the Free Software
     ** Foundation and appearing in the file LICENSE.GPL included in the
     ** packaging of this file.  Please review the following information to
     ** ensure the GNU General Public License version 3.0 requirements will be
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     #include <QCoreApplication>
     #include <QFile>
     #include <QStringList>
     #include <QTextStream>
     #include <QXmlStreamReader>

     /*
      This class exists for the sole purpose of creating a translation context.
     */
     class XmlStreamLint
     {
     public:
         Q_DECLARE_TR_FUNCTIONS(XmlStreamLint)
     };

     int main(int argc, char *argv[])
     {
         enum ExitCode
         {
             Success,
             ParseFailure,
             ArgumentError,
             WriteError,
             FileFailure
         };

         QCoreApplication app(argc, argv);

         QTextStream errorStream(stderr);

         if (argc != 2)
         {
             errorStream << XmlStreamLint::tr(
                            "Usage: xmlstreamlint <path to XML file>\n");
             return ArgumentError;
         }

         QString inputFilePath(QCoreApplication::arguments().at(1));
         QFile inputFile(inputFilePath);

         if (!QFile::exists(inputFilePath))
         {
             errorStream << XmlStreamLint::tr(
                            "File %1 does not exist.\n").arg(inputFilePath);
             return FileFailure;

         } else if (!inputFile.open(QIODevice::ReadOnly)) {
             errorStream << XmlStreamLint::tr(
                            "Failed to open file %1.\n").arg(inputFilePath);
             return FileFailure;
         }

         QFile outputFile;
         if (!outputFile.open(stdout, QIODevice::WriteOnly))
         {
             errorStream << XmlStreamLint::tr("Failed to open stdout.");
             return WriteError;
         }

         QXmlStreamReader reader(&inputFile);
         QXmlStreamWriter writer(&outputFile);

         while (!reader.atEnd())
         {
             reader.readNext();

             if (reader.error())
             {
                 errorStream << XmlStreamLint::tr(
                                "Error: %1 in file %2 at line %3, column %4.\n").arg(
                                    reader.errorString(), inputFilePath,
                                    QString::number(reader.lineNumber()),
                                    QString::number(reader.columnNumber()));
                 return ParseFailure;

             } else
                 writer.writeCurrentToken(reader);
         }

         return Success;
     }